Abstract:

Aiming to larger prediction error of discharge and mine water bursting cannot be managed due to mine drainage ability, the paper studyed the main factors affecting mine discharge based on the secular dynamic variation rule of mine discharge in Longgu mine. First, revealed variation of water-filling factor of mining effects on prediction of discharge. The numerical method was used to predict the dynamic variation of mine discharge in the mine excavation process with mine development progress. The results showed that compared with the previous simulation method that scope were unchanged, if considering the excavation sequence and real-time adjusting pumping wells for simulating discharge, taking the simulating results that coal extraction in advance as initial flow field of later model, the prediction of discharge would be more accurate, the calculation error was reduced to some extent. It had more spreading values by above method.

Key words: mining process, mine discharge, dynamic forecast, numerical simulation method